Shenyang Newtech International Co., Ltd.
ADD.: Rm C-8-2 No.168 Shifu Road, Shenyang 110014, China
Adam'mobile No.： 0086 13804042544 TEL: 0086 24 22532086 FAX: 0086 24 22532084 Skype: adamhuang08
3.Structural principle
3.1 Main structure
This compressor is mainly composed of compressor set, explosion-proof motor, control box, cooling fan, oil/gas separator,
pipeline, safety components and frame, etc. At first, the gas runs into the 1st stage cylinder through the gas intake pipe. After
the 1st stage compression, the gas runs to the 1st stage cooler and after cooling runs to the 2nd stage cylinder. Thus, after
passing through the 3rd stage cylinder and 4th stage cylinder, the pressure of natural gas will be raised to 20MPa. Finally,
the compressed natural gas is discharged through the high pressure de-oil filter where the excessive residual oil will be
filtered out and fed through the high-pressure hose to fill cars. The compressor is integrally explosion-proof and has the
discharge pressure protection. If filling to the setting pressure, the compressor will automatically stop filling. In addition, it
fits a safety valve to prevent overpressure.
3.2 Compressor set
The compressor set is mainly composed of crankcase, crankshaft, cylinder, piston, gas intake and discharge valves, etc. The
crankcase is made of aluminum alloy. The needle roller bearings are installed both on the front and rear end covers of the
crankcase so as to support the rotation of the crankshaft. Meanwhile, the front and rear end covers of the crankcase are
sealed with the O-rings. The movement of the crankshaft and connecting rod fully depends on the operation of the needle
bearing with the protective support. All the connecting rods are installed on the crankshaft with the special angles. The 1st
stage and 2nd stage pistons are all made from aluminum and equipped with piston rings. The 3rd stage piston is made from
ferroalloy and with the special piston rings. The 4th stage piston is made from reliable neutral steel without elastic rings. The
cylinder with radiator plates is provided in each stage.
3.3 Pressure gauge and safety valve
Each stage of pressure gauge installs on the compressor in order to check whether there is a trouble in compressor, according
to whether pressure readings of each stage are in setting values or not. The safety valve installs at the rear of each stage
cylinder to take the overpressure protection. The preset opening pressure of safety valve is 1.1times to rated pressure. The
safety valve should be installed on the compressor in advance to avoid overpressure due to any compressor troubles. As soon
as the safety valve’s pressure reaches to the preset value, the valve will open automatically. Please don’t adjust the safety
valve, otherwise, the serious damage or danger will be resulted from, and if so, our warranty for maintenance will be
cancelled. Caution: (the opening pressure of the safety valve can’t be adjusted higher at random).
4.Installation and operation
4.1 Installation
The compressor should be placed at clean and good ventilation site where also supplies the qualified power. The gradient
between compressor and ground should no more than 5°. There must be enough space around the compressor so that it will
be convenient to thermal radiation and operation.
4.2 Preparation before startup
Fill the crankcase with the recommend compressor lubricant and check that the oil level should be above the upper line of
oil leveler. Note: it will be unfavorable if the oil level is too high or too low. If the oil level is too high, the oil consumption
will be larger and the carbon will be accumulated in the gas valve. If the oil is too low, the lubrication must be poor, even the
compressor will be damaged.
In accordance with the requirements in the electrical wiring diagram, the wire should be connected correctly with reliable
